α, β-DIAMINOBUTYRIC ACID OBTAINED FROM ASPARTOCIN

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  • HAUSMANN W. K.
    Lederle Laboratories, A Division of American Cyanamid Company Present address, Ayerst Laboratories, Incorporated
  • BORDERS D. B.
    Lederle Laboratories, A Division of American Cyanamid Company
  • LANCASTER J. E.
    Lederle Laboratories, A Division of American Cyanamid Company Central Research Laboratories, Division of American Cyanamid Company

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  • アルファ , ベータ-Diaminobutyric acid obtained from aspartocin

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α, β-Diaminobutyric acid, isolated from the acid hydrolysate of aspartocin, was resolved into two of the four possible isomers with a Technicon amino acid autoanalyzer. ORD and NMR studies of the isolated isomers indicated that one had the D-erythro and the other the L-threo configuration. The difference in NMR spectra of the two isomers was quite likely a consequence of restricted rotation about the Cα-Cβ bonds due to electrostatic repulsion of charged amino groups. Whether the antibiotic contains both isomers or one was formed by racemization during hydrolysis was not determined.

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